ArcticZone Online Entertainment Support Forums

receiving experience has changed from previous Tele-Arena titles. now you do not receive the experience "per-hit" and instead will receive all of the experience you would have received "per-hit" when the monster is killed divided by all other participants in the monster's death. and of course this will be offset by any magical items, relics, or spell gems you have equipped.

Also, experience degrades over time, if you hit a monster a couple rounds and leave the room so someone else can kill it you will get much less, so stay vigilant.